Comp, S/C, Street 427 BB Engines

[DanEC]

The 428 I had built for my ERA Street Roadster by Keith Craft sounds a bit like what you are describing. It's a 428 block with 4.25 inch crank and Chevy rods, 9:1 compression, early LR performance heads ported/polished/early 427 valves, 1963 427 LR dual-quad intake, 427 dual point distributor. Keith Craft had a custom ground, hydraulic, flat tappet cam with 230/236 duration and from memory about .570 lift. It has a little rump, rump to the idle but is a torque motor that makes max power around 5500 rpm. Before I completely got used to the shifter I took off several times in 3rd accidently and didn't even know it until I realized the rpm were climbing slowly and I didn't need to shift. The dyno guy said I probably could have made another 25 or 30 HP stepping up to massaged Edelbrock aluminum heads. Keith Craft didn't want to go much above 9:1 with iron heads but if you use aluminum then you can bring that up some more. The 427 aluminum LR, dual quad intake is known to make a lot of torque. My torque curve is really broad.

I don't think anyone is making an aluminum low riser head (?). But you can use a MR head with LR intakes if that is your desire. Are you planning to do your own build or planning to use an engine builder?

Are you planning to build a Street Roadster with a smooth hood? If so, you are correct that you need to use a LR intake. It takes a hood scoop to fit a MR intake.

Good luck